Patents by Inventor Robert Sancken

Robert Sancken has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Purification device
    Patent number: 5139678
    Abstract: A liquid filtering and purifying device and method for filtering and purifying used engine coolant in order to produce a concentrated portion for disposal and a purified portion intended to be reused has a plurality of filtering, separating and purifying devices, both mechanical and membranous. The purification device and method of this invention provide for multiple recirculation for removing and concentrating impurities and contaminants.
    Type: Grant
    Filed: May 14, 1990
    Date of Patent: August 18, 1992
    Assignee: JH Systems, Inc.
    Inventors: William M. Frederick, Jr., David Kennell, Robert Sancken